Hi Frank, On 24/05/10 16:52 -0400, Frank Middleton wrote: > Many many moons ago, I submitted a CR into bugs about a > highly reproducible panic that occurs if you try to re-share > a lofi mounted image. That CR has AFAIK long since > disappeared - I even forget what it was called. > > This server is used for doing network installs. Let's say > you have a 64 bit iso lofi-mounted and shared. You do the > install, and then wish to switch to a 32 bit iso. You unshare, > umount, delete the loopback, and then lofiadm the new iso, > mount it and then share it. Panic, every time. > > Is this such a rare use-case that no one is interested? I have > the backtrace and cores if anyone wants them, although > such were submitted with the original CR. This is pretty > frustrating since you start to run out of ideas for mountpoint > names after a while unless you forget and get the panic. > > FWIW (even on a freshly booted system after a panic) > # lofiadm zyzzy.iso /dev/lofi/1 > # mount -F hsfs /dev/lofi/1 /mnt > mount: /dev/lofi/1 is already mounted or /mnt is busy > # mount -O -F hsfs /dev/lofi/1 /mnt > # share /mnt > # > > If you unshare /mnt and then do this again, it will panic. > This has been a bug since before Open Solaris came out. > > It doesn't happen if the iso is originally on UFS, but > UFS really isn't an option any more. FWIW the dataset > containing the isos has the sharenfs attribute set, > although it doesn;t have to be actually mounted by > any remote NFS for this panic to occur. > > Suggestions for a workaround most welcome! > the bug (6798273) has been closed as incomplete with following note:
"I cannot reproduce any issue with the given testcase on b137." So you should test this with b137 or newer build. There have been some extensive changes going to treeclimb_* functions, so the bug is probably fixed or will be in near future. Let us know if you can still reproduce the panic on recent build. thanks -jan _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
